I did the Legendary line once as well, won't do it again for the simple fact that I refuse to do LFR again. If the expansion has another Legendary line similar, I'll be doing it in Flex (aka the new normal).

Well...I could say "levelling every class to 90" - In a way I still level 11 times, but I will level every class only once.

I will not try and get any pvp achievement again on any second character
I will probably not do the legendary questline again, but not because it bored me, it is more a time issue (would now have to reach honored by killing stuff in VoeB, got the 20 sigils)

Originally Posted by Blizzard Entertainment

... there are lots of different types of players, with different amounts of time to play, and different tastes for the content and difficulty and time commitment they want to give to any of those pieces of content. The person that plays for an hour or so a few times a week is playing the same game as the person that plays five hours every night.....